A torque distribution strategy was designed by using fuzzy logic to realize the optimal control. The vehicle load zones were dynamically divided into several zones by several torque lines to indicate the drivers deman...A torque distribution strategy was designed by using fuzzy logic to realize the optimal control. The vehicle load zones were dynamically divided into several zones by several torque lines to indicate the drivers demand and the high or low efficient operating areas of the diesel engine. The fuzzy logic controller with trapezoid membership function and Mamdani rule reference mechanism was utilized. There are over 100 rules used in this fuzzy-based torque distribution strategy which are sorted into four rule-bases. The fuel economy and acceleration tests were designed to test and validate the integrated starter/generator (ISG) bus perfor-mance using fuzzy-based torque distribution strategy. The fuel economy is improved 7.7% compared with the rule-based strategy. Finally the road test results reveal that there is about 15% improvement of fuel economy. And the 0-50 km/h acceleration time is 9.5% shorter than the original bus.展开更多
文摘A torque distribution strategy was designed by using fuzzy logic to realize the optimal control. The vehicle load zones were dynamically divided into several zones by several torque lines to indicate the drivers demand and the high or low efficient operating areas of the diesel engine. The fuzzy logic controller with trapezoid membership function and Mamdani rule reference mechanism was utilized. There are over 100 rules used in this fuzzy-based torque distribution strategy which are sorted into four rule-bases. The fuel economy and acceleration tests were designed to test and validate the integrated starter/generator (ISG) bus perfor-mance using fuzzy-based torque distribution strategy. The fuel economy is improved 7.7% compared with the rule-based strategy. Finally the road test results reveal that there is about 15% improvement of fuel economy. And the 0-50 km/h acceleration time is 9.5% shorter than the original bus.
文摘针对基于集成发电机/起动机(ISAD)技术混合动力各部件的特性,在实现柴油机、ISG(Integrated Starter Generator)电机、蓄电池和传动系统最佳匹配的前提下,设计了混合动力系统动态转矩协调控制策略.以转矩为控制变量,通过转矩总需求和柴油机万有特性脉谱图,确定了状态切换的条件及柴油机和ISG电机的目标转矩.采用Matlab/Simulink平台进行了CYC_ECE_EUDC工况的动力性仿真.仿真结果表明:文中提出的控制策略能够满足ISAD迅速起动、低速补偿转矩、加速提供辅助动力、充电功率恒定等要求;瞬态工况时,通过ISG电机助力,缩短了工况过渡时间;稳态工况时,通过电机转矩补偿,实现了无转矩波动的状态切换,改善了状态切换过程中动力传递的平顺性;柴油机和ISG电机工作点集中在高效率区域,SOC(Stat of Charge)维持在最佳工作区域;整车实现起步-助力-发电一体化的功能,并为开发控制软件平台提供了理论依据.
